The significance of the buckling for the spectrum and the group cross sections. Project DRAGON

Technical Report · Mon Apr 15 04:00:00 EST 1963

OSTI ID:4108627

Micheelsen, B.

The spectrum codes which are used for the calculation of group cross sections assume a leakage term - a buckling, which hitherto has been chosen rather arbitrarily. As the effect of the buckling on the spectrum calculation has been found significant for the Dragon reactor a method is proposed in this paper for the determination of the appropriate bucklings which are to Be used in the spectrum code. The method is iterative as it is using bucklings calculated from preceding diffusion group calculations. The resulting bucklings are dependent on the group energies and the utilisation of these bucklings involve approximations which are least when only small regions are investigated. The behaviour of the bucklings as functions of energy, the significance for the group cross sections and the multiplication factor is discussed. Finally, a comparison is performed of the spectrum obtained by the aid of the Buckling method and by a one-dimensional multi-group diffusion theory code.

• Research Organization: Atomic Energy Establishment (AEE), Winfrith, England (United Kingdom)
• Sponsoring Organization: Atomic Energy Establishment (AEE)
• NSA Number: NSA-24-040910
• OSTI ID: 4108627
• Report Number(s): DP-Report--159; CONF-630511--19
• Country of Publication: United Kingdom
• Language: English

Related Subjects

CROSS SECTIONS
DRAGON
ERRORS
HIGH-TEMPERATURE GAS-COOLED REACTOR EXPERIMENT/neutron cross sections and spectra for
effects of buckling on calculations of
LEAKS
MATHEMATICS
N38110* --Power Reactor Development--Kinetics & Dynamics
N38910 --Reactor Theory--Kinetics
NEUTRONS
POWER REACTORS
REACTIVITY
REACTOR KINETICS
SPECTRA